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EWG's Tap Water Database — 2021 UPDATE

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2,4,5-TP (Silvex)

Lexington Park

2(2,4,5-trichlorophenoxy) propionic acid (2,4,5-TP or Silvex) is a cancer-causing herbicide banned in the U.S. in 1985 because of its toxicity. It is still detected as a groundwater contaminant in areas where it was sprayed or stored.

MORE ABOUT THIS CONTAMINANT

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND10ND
2015ND10ND
2016ND90ND
2017N/A00N/A
2018ND30ND
2019ND110ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 3 ppb

The EWG Health Guideline of 3 ppb for 2,4,5-TP was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against harm to internal organs.

EPA Maximum Contaminant
Level (MCL) 50 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2014-08-120180007_18_00061ND
2015-08-17E16000640003ND
2016-08-25E17000818004ND
2016-08-25E17000818002ND
2016-08-31E17000931001ND
2016-09-21E17001335002ND
2016-09-21E17001333002ND
2016-09-21E17001282001ND
2016-09-21E17001336001ND
2016-09-21E17001290001ND
2016-09-26E17001367001ND
2018-05-30E18004302001ND
2018-05-30E18004299001ND
2018-05-30E18004301001ND
2019-06-20E19004405001ND
2019-06-20E19004422001ND
2019-06-20E19004424001ND
2019-08-12E20000594026ND
2019-08-12E20000594006ND
2019-08-12E20000594011ND
2019-08-12E20000594021ND
2019-08-12E20000594016ND
2019-08-12E20000594001ND
2019-09-23E20001186001ND
2019-09-23E200001188001ND